We divide 138274 by 12
Our goal is to divide 138274 by 12.

Advancing to step 1:
When dividing 1 by 12, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 12

Going ahead to step 2:
12 goes into 13 1 times with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 12 from 13, we get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 12

On to step 3:
12 can be fit into 18 1 times, resulting in a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 11.0
The remainder is 6 after subtracting 12 from 18.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 12

Going ahead to step 4:
12 can be fit into 62 5 times, resulting in a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 115.0
If we subtract 60 from 62, we get 2.
Append the next digit (7) from the dividend to 2 and continue with: 27 / 12

Let's proceed to step 5:
12 goes into 27 2 times with a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 1152.0
Deduct 24 from 27 and we're left with 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 12

Step 6:
34 divided by 12 is 2 with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 11522.0
The remainder is 10 after subtracting 24 from 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
12 goes into 100 8 times with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 11522.8
Deduct 96 from 100 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
When dividing 40 by 12, we get 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 11522.83
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 9:
12 can be fit into 40 3 times, resulting in a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 11522.833
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 11522.833 with a remainder of 0.0004.